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Analog Devices Inc. LTC3884EUK#PBF
- Part No.:
- LTC3884EUK#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884EUK#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:182
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Product details
Overview
LTC3884EUK#PBF from Analog Devices is a dual-output PolyPhase synchronous step-down DC/DC controller with PMBus/I²C digital power system management, integrated N-channel MOSFET gate drivers, sub-milliohm DCR current sensing, ±0.5% output voltage accuracy over temperature, and 4.5V to 38V input voltage range. It targets high-density point-of-load regulation in telecom, datacom, and industrial systems requiring precise telemetry and sequencing.
For engineers reviewing the LTC3884EUK#PBF datasheet, LTC3884EUK#PBF pinout, LTC3884EUK#PBF application, or LTC3884EUK#PBF equivalent, this page delivers verified technical context, confirmed pin functions, real-world application mappings, and validated alternative options for digital multiphase power design.
Technical Context
The LTC3884EUK#PBF implements a constant-frequency current-mode control architecture optimized for ultra-low-impedance inductor DCR sensing (down to 0.32 mΩ), enabling accurate current measurement without sense resistors. Its dual independent PWM channels support up to six-phase interleaving via SHARE_CLK synchronization and include programmable loop compensation via digital interface or EEPROM storage.
It integrates dual gate drivers (TG/BG) with 2.6 Ω pull-up and 1.5 Ω pull-down RDS(ON), internal INTVCC (5.5 V) and VDD33 (3.3 V) regulators, input current sensing amplifier, and fault-protected PGOOD/FAULT pins per channel. All telemetry-VIN, IIN, VOUT, IOUT, temperature-is read back with 16-bit VOUT resolution (244 µV LSB) and 10-bit current/voltage/temperature resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 38 V - supports wide-range industrial and telecom inputs without external pre-regulation |
| Output Voltage Range | 0.5 V to 3.5 V (low-DCR mode); 0.5 V to 5.5 V (standard mode) - covers core logic, FPGA, ASIC, and memory rails |
| Output Voltage Accuracy | ±0.5 % over –40°C to +125°C - ensures stable operation across automotive and industrial thermal environments |
| DCR Sensing Threshold | Sub-milliohm (0.32 mΩ typical) - enables high-efficiency, low-loss current sensing using inductor DCR only |
| Telemetry Resolution | VOUT: 16-bit (244 µV LSB); IOUT/VIN/Temp: 10-bit - provides precision closed-loop monitoring for dynamic load management |
| PMBus Compliance | PMBus v1.3 - enables standard command set (READ_VIN, READ_IOUT, STORE_DEFAULT_ALL, etc.) in existing digital power infrastructure |
| Gate Driver RDS(ON) | TG: 2.6 Ω (pull-up), 1.5 Ω (pull-down); BG: 2.4 Ω (pull-up), 1.1 Ω (pull-down) - drives high-side/lower-side MOSFETs directly with fast 30 ns transitions |
Pinout & Package
Package: 48-lead (7 mm × 7 mm) plastic QFN (UK package), exposed pad (Pin 49) connected to SGND. Thermal resistance θJA = 31°C/W, θJC = 3°C/W. Requires soldering of exposed pad for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSENSE0+/VSENSE0– | Channel 0 output voltage feedback | Differential sensing for precise VOUT regulation; supports remote sensing and Kelvin connections |
| ISENSE0+/ISENSE0– | Channel 0 current sense input | Accepts sub-milliohm DCR or low-value resistor signals; enables lossless current monitoring |
| TG0/BG0/SW0/BOOST0 | Channel 0 gate drive and switching nodes | Integrated driver outputs for external N-channel MOSFETs; BOOST supplies gate drive voltage |
| PGOOD0/FAULT0/RUN0 | Channel 0 status and control | Open-drain power-good indicator, fault flag, and enable input with 10 µs digital filtering |
| SDA/SCL/ALERT/SHARE_CLK | PMBus and phase synchronization interface | I²C-compatible bidirectional bus with CRC/ECC-protected EEPROM access and multi-phase clock distribution |
| INTVCC/EXTVCC/VDD33/VDD25 | Internal power rails | On-chip 5.5 V, 3.3 V, and 2.5 V regulators supply internal circuitry and reduce external BOM count |
Key Features
| Feature | Design Value |
|---|---|
| Digital loop compensation | Programmable gm and RTH values stored in EEPROM - eliminates manual RC tuning and enables field firmware updates |
| Internal EEPROM with ECC | 10,000 write cycles, 10-year retention at ≤125°C - stores configuration, fault logs, and calibration data with error correction |
| Accurate PolyPhase current sharing | ±1.25% IOUT_TUE across up to 6 phases - ensures balanced thermal loading and scalable current capacity |
| Integrated input current sense amplifier | Configurable gain (2/4/8), 10-bit resolution, ±2% TUE - enables system-level input power monitoring and protection |
| Programmable soft-start/stop & sequencing | Voltage- or time-based ramp control per channel - prevents inrush, meets ASIC/FPGA power-up timing requirements |
Applications
| Telecom Point-of-Load Regulation | Datacenter Server VRM |
|---|---|
Use Scenario: Regulating 1.8 V/30 A and 1.0 V/30 A rails for high-speed SerDes and CPU cores in 48 V intermediate bus architectures. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing two independent buck stages with synchronized phase interleaving and PMBus telemetry. Use Value: Sub-milliohm DCR sensing eliminates power loss from current-sense resistors; ±0.5% VOUT accuracy maintains signal integrity under dynamic load transients. |
Use Scenario: Powering multi-rail FPGAs and AI accelerators requiring strict voltage sequencing, margining, and real-time telemetry in OCP-compliant servers. IC Role / Device Role / Timing Role: Digital power manager executing voltage ramp, delay, and fault-response sequences via PMBus commands and internal EEPROM-stored profiles. Use Value: Programmable soft-start and voltage-based sequencing ensure safe power-up of sensitive logic; fault logging supports predictive maintenance and root-cause analysis. |
| Industrial PLC Power Supply | Automotive ADAS Domain Controller |
Use Scenario: Generating isolated 3.3 V and 5.0 V auxiliary rails from 24 V vehicle or factory bus in ruggedized programmable logic controllers. IC Role / Device Role / Timing Role: Dual-output controller with wide VIN (4.5–38 V), internal LDOs, and robust fault handling for unregulated industrial inputs. Use Value: Integrated INTVCC/VDD33 regulators reduce external component count; AEC-Q100 qualified variants support extended temperature operation. |
Use Scenario: Supplying 1.1 V core and 1.8 V I/O rails to radar SoCs in autonomous driving domain controllers with functional safety requirements. IC Role / Device Role / Timing Role: Safety-aware power controller delivering OV/UV/OC fault detection, PGOOD assertion with 60 µs filtering, and fault logging to EEPROM. Use Value: Internal temperature sensing (±1°C TUE) and external thermistor monitoring enable thermal derating; fault propagation via FAULT pins supports ASIL-B diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital multiphase controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883EUK#PBF | Single-output controller; lacks second VOUT/ISENSE channel and independent sequencing per rail | Suitable only for single-rail systems; cannot replace dual-rail coordination or independent telemetry | Select when only one regulated output is required and cost reduction outweighs flexibility loss |
| MP2965GQ-PR | No integrated gate drivers; requires external driver ICs; lower telemetry resolution (12-bit VOUT vs 16-bit) | Targeted at cost-sensitive consumer-grade applications; lacks AEC-Q100 qualification and ECC EEPROM | Choose for non-automotive, non-critical telemetry use cases where board space and BOM count are secondary concerns |
Compared with LTC3884EUK#PBF, LTC3883EUK#PBF reduces channel count and telemetry depth but lowers system complexity, while MP2965GQ-PR trades integrated drivers and precision telemetry for lower unit cost-neither offers full functional equivalence in dual-rail, high-accuracy digital power management.
Availability
LTC3884EUK#PBF is available at Aetrix Electronics and suitable for telecom point-of-load regulation, datacenter server VRMs, and industrial PLC power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3884EUK#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and power management markets since 1965.
The LTC3884EUK#PBF belongs to Analog Devices' Power by Linear™ digital power controller family, designed specifically for high-efficiency, digitally managed multiphase DC/DC conversion in demanding infrastructure and embedded applications.
FAQ
What is the maximum number of phases supported by the LTC3884EUK#PBF?
The LTC3884EUK#PBF supports up to six phases through its SHARE_CLK output and phase-locked loop architecture. It operates natively as a dual-output controller (two independent channels), and each channel can be paralleled with additional LTC3884EUK#PBF or compatible controllers (e.g., LTC3883) to scale total phase count while maintaining synchronized interleaving and current sharing within ±1.25% accuracy.
Does the LTC3884EUK#PBF require external gate drivers?
No, the LTC3884EUK#PBF integrates dual N-channel MOSFET gate drivers (TG0/BG0 and TG1/BG1) with specified RDS(ON) values (e.g., TG pull-up = 2.6 Ω). It directly drives high-side and low-side external power MOSFETs without needing external drivers-making it suitable for compact, high-efficiency designs where board space and component count are critical.
How does sub-milliohm DCR sensing work on the LTC3884EUK#PBF?
The LTC3884EUK#PBF uses dedicated ISENSE0± and ISENSE1± inputs with high-precision amplification and offset cancellation to measure voltage drops across inductor DCR as low as 0.32 mΩ. This eliminates discrete current-sense resistors, reducing power loss and PCB area. The controller compensates for DCR temperature drift digitally using external thermistor inputs (TSNS0/TSNS1) and stored coefficients.
Can the LTC3884EUK#PBF store configurations permanently?
Yes, the LTC3884EUK#PBF includes internal EEPROM with ECC protection, supporting 10,000 write cycles and 10-year data retention at ≤125°C. Configuration parameters-including output voltages, switching frequency, soft-start timing, fault thresholds, and loop compensation-can be written via PMBus and retained across power cycles, enabling true "set-and-forget" digital power deployment.
Is the LTC3884EUK#PBF AEC-Q100 qualified?
The LTC3884EUK#PBF itself is not AEC-Q100 qualified; however, automotive-grade variants such as LTC3884ERHE#WPBF (with #W suffix) are manufactured under controlled processes and certified to AEC-Q100 Grade 1 (–40°C to +125°C). These versions include enhanced reliability testing, traceability, and automotive-specific documentation required for ADAS and infotainment systems.
LTC3884EUK#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 38V
- Frequency - Switching:
- 200kHz ~ 1MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus
- Control Features:
- Enable, Frequency Control, Phase Control, Power Good
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
LTC3884EUK#PBF FAQ
1.How can I place an order for LTC3884EUK#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884EUK#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC3884EUK#PBF reliable?
The price and inventory of LTC3884EUK#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3884EUK#PBF is usually 5 days.
3.What payment methods are accepted for LTC3884EUK#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884EUK#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884EUK#PBF?
LTC3884EUK#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884EUK#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC3884EUK#PBF?
For technical support, including LTC3884EUK#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884EUK#PBF requirements.
6.How does Aetrix verify that LTC3884EUK#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3884EUK#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3884EUK#PBF meets industry standards.
7.What is the process for return or replacement of LTC3884EUK#PBF?
All LTC3884EUK#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884EUK#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC3884EUK#PBF part is unused and in its original packaging.
Return procedure for LTC3884EUK#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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